Hermetic-sealing device



0. W. GRAHAM.

HERMETIC SEALING DEVICE.

APPLICATION FILED JAN.17. 191a.

Patentefl Aug. 3L 192% mum/"0R UAW/W 5 M165 m HAM,

,4 TTOR/VE V UNITED STATES PATENT OFFICE.

cHARLEs W. GRAHAM, or onns'rwoon, nnw ronx, nssrenon T0 AMERICAN canCOMPANY, on new YORK, n. Y., A. CORPORATION or new JERSEY,

HERMETIC- SEALING DEVICE.

Patented Aug. 31, 1920.

Application filed January 17, 1916. Serial No. 72,600.

tachment of the endparts; and has for its objects to improve theperfection of the hermetic joint or seam by which the top end or coveris united to the can body; to simplify the preliminary partialassemblage of the parts; and to make the final sealing operation moresimple and free from mistake. To these ends the invention comprises acan body having an outstanding peripheral flange around its mouth, and apacking, such for instance as a paper ringliner, fixed on said flange soas to be fed with the can body, and to be stationary therewith duringthe sealing operation, the

flange and ring-liner being adapted to be infolded with the cover flangein a known manner to form a hermetic double or equlvalent seam. The saidflanged can body and packing constitute a sealing element or unit whichis or may be supplied to packers for use with any suitable andcorresponding top end or cover.

Advantages attendant on this improvement are that a large number or longrow of cans being fed to be closed may be inspected at a glance andwithout waste of time or trouble, to see whether the'packing is missingfrom any can; whereas, when the packings are carried by and fed with ther covers they are out of sight and a cover from which the packing hasbeen lost may be attached to a can, with the result that a hermeticjoint is not produced. Also it is desirable that the packing be freewith respect to the cover and not partake of any rotary movement'of thesame which maybe imparted by the seaming head, but remain fixed withrespect to the can flange; whereby till the cover may turn smoothly onthe packing and the latter will not be abraded, cut or crumpled'by beingrubbed against either the outer or the inner edge of the can bodyflange, or against the surface thereof which elements constituting ried1n proportionsand arrangement without is ordinarily not so smooth as theface of the cover.

With such objects in'view, as well as other advantages which may beincident to the use of the improvements, the invention consists in theparts and combinations thereof hereinafter set forth and claimed, withthe understanding that the several necessary the same may be vade artingfrom the nature of the invention.

11 order to make the invention more clearly understood there is shown inthe accompanying drawings means for carrying the same into practicaleffect, without lin. itlng the improvements, in their useful a1.pllcations, to the particular constructions which, for the purpose ofexplanation, have been made the subject of illustration. In the saiddrawings Figure 1 is a top plan view of a flanged can body, anda'packing, embodying the inyention, the cover being indicated in dottedmes.

Fig. 2 is a vertical section of the upper end of the same on a largerscale.

Fig. 3 is a similar view of the sealed can.

Referring to the drawings, 1 is the can body formedat its mouth with anoutstanding peripheral flange 2. This flange is suitable to beinterfolded with acorresponding flange 3 of atop end or can cover 4 in a.known manner and by automatic machinery to form a hermetic sanitaryclosure, with the 'aid of the interposed packing or ring-liner theflange 3.

This ring-liner or its equivalent is fixed on the body flange 2'beforethe body is fed to the closing station. This is done by forming apermanent bend or crimp in the said ring liner orpacking sothat the ringliner is arranged to partly infold the flange 2 and inclose its outeredge. Preferably additional securing by the use of cement be: tween thering liner and the can body flange is omitted, the said crimping of thering liner under the can body being ordinarily suflicientto secure theliner as described so that it will not become displaced prelimi-- naryto or during the can closing operation.

lhe described formation of the gasket is a highly practical means forobtaining the described hermetic seal because, if the outer edge of thepaper gasket is not previously folded around the body flange there is noguarantee that it will fold properly around the flange when the doubleseam is being formed and it would often result that the flange of thebody would cut ofl an outer ring from the paper gasket and squeeze itdown into the lower bend of the double seam, which unintended crowdingdown of the paper has been found to cause ruptures of the metal atvarious points so as to produce leaks, the cause of which was difficultto determine. In my improved form of seal, if the sharp edge of the bodyflange should cut oflthe gasket and separate a ortion of it when thedouble seam is being ormed, no harm would result, such as abovedescribed, because that portion of the gasket which belongs in the innerfold of the seam is already in position parallel with the under side ofthe body flange before the seam is 0f the 7 cans having ends securedthereto by double seams, comprising a can body having an started to beformed. My sealing device I will therefore make a superior double seamand will always insure that a portion of the paper ring will occupy thesaid inside fold joints are formed, one on the u per or outer face ofthe can body flange an the other on the under or inner face of the canbody which is a desideratum in producing flange that are reliablyhermetically sanitary cans sealed.

What is claimed is y 1. A means of forming hermetic joints inoutstanding seaming flange formed on its end, and a can cover having anoutstanding seaming flange of greater diameter than double seam. Therebytwo sealed said can body flange, said seaming flange of portions of saidgasket are in parallel contact with both the inner and outer surfaces ofthe body flange and the surface of the cover flange is in contact withsaid parts of the liner to form an hermetic point.

2. A means of forming hemetic joints in cans having ends secured theretoby double seams, comprising a can body having an outstanding seamingflange formed on. its end, and a can cover having an outstandingpartially turned seaming flange of greater diameter than said can bodyflange, said partiall turned portion folding around said b0 y flange andlying parallel with the undersurface of said body flange in thecompleted seam, together with a flat gasket placed on the top surface ofsaid body flange and having a peripheral ed e extend ing beyond the edgeof said body ange and folded around said edge and having a portionresting against the under surface of said body flange prior toapplication of the cover thereto so that when a double seam is formedthe said gasket forms a filling be tween the surfaces of said body andcover flanges, tending to close and permanently seal all interstices andirregularities of the surfaces on both sides of said body flange and oneside of cover flange, and produce thereby an hermetic oint.

In testimon whereof I aflix m si ature, HARLESW. e Afl iM.

